Tire-pump connection



j.y B. MCMULLIN. `TIRE PUMP CGNNECTION.' Armcmxon min 11113711.1919.V

11,3405785. j i Patented May18,19zo.

WiTNEISSES P i Avromasv UNITED STATES PATENT oEEioE.

JOSEPH 1B. MQMULLIN, 0F OSKALOOS, IOWA, ASSlIGNOR T0 WESTERN MANUFACTURIN G C0., OIF OSKALODSA, IOWA, .A CORPORATION 0F IOWA.

TIRE-PUMP vlllONNEJYI'IN'. v i

Specification of Letters Patent.

Patented May 1s, i920.

llppufaunm ined :muy ii, i919. serial No. 310,144..

To all whom it 'may concern: y

Be -it known that I, JOSEPH B. MCMULLIN, a citizenk of the UnitedStates, residing at Oskaloosa, in thel county of Mahaslra and State oflowa, have invented a new and useful TirePump Connection, of which the ol lowing is a speciiication.

This invention has reference to tire pump connections, and itsy object is to provide a readily attachable and detachable means for` coupling an air pump or supply ofcompressed air to the inner tube nipple'oiI a pneumatic tire.

Ordinarily tire pumps are provided with hose terminals arranged toI screw on the inner tube nipple or to be pressed thereon., and in the latter case depending upon the resiliency of a rubber sleeve or Washer to v produce an air-tight connection.

f ber sleeve insures air-tight connections butv ln accordance with this invention, a rubmanipulating means are provided'whereby the rubber sleeve may be made to encircle the in ner tube nipple so loosely that the application and removal of the connection does not wear the rubber sleeve or gasket, since it is only after the connection is in place that the rubber is moved into air-tight relation to the nipple and this air-tight condin tion is destroyed beforej the connection is withdrawn from the nipple.

The invention will be bestV understood. from a consideration of the following de-y 'tailed description taken in connection with the accom anying drawing forming part of this speci cation, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawing, but may be changed and modified so long as such changes and modications mark no material departure fromy the salient features ci the 'invention as eX-y pressed in the appended claims.

Figure l is a longitudinal section through the connection, with the latter in, close spaced relation to an inner tube nipple. Fig. 2 is a similar View but with the connection applied to the nipple.

Fi 3 is an elevation ot. a split thimble forming part of the connection.

Fig. 4 is a section on lhe line 4--4 of Fig. 1.

' Fig. 5 is a bottom plan` view of a follower forming part of the connection.

Fig. 6 isa fragmentary elevation partly .in section of the conventional tire and tire.

valve to which my connection is adaptedv lobe coupled. v f

, .Referring to the drawing, there is shown a shell l which may be considered as of cylindrical forni throughoutv the greater porltion of its length, having one end 2 contracted andv provided with 'an opening 3 of a size to freely receive the usual threaded nipple 4 of the inner tube of a pneumatic tire. Withn the shell l there is located a follower 5 ywhich may also be of cylindrical outline and provided with an axial bore 6 extending for the greater portion of the distance Athrough the' length of the follower. Branched oil from the follower is an elbow 7 extending through a longitudinal slot 8 in one sidey of the shell 1 and terminating in a stem 9 outsideo the shell, which stem is suitably shaped to'receive and retain one end of an air hosel 10, The lairliose may be connected at the other end-to a hand pump,

or foot pump',v or to 'a supply of air under pressure, the inventionbeing applicable to any suitable device whereby compressed air may be directed into the inner tube of a f pneumatic tire'or to any point of utilization.

ll-itliin the shell 1 and located between the follower 5 and the contracted end 2 of the cylinder is a thimble il having longitudinal slits 12 .for thegreater-portion of its length (see Fig. 3), and the thimble'has one end 13 contracted yin conformity with the contractled shape ofthe interior of the shell at the end2 so that such end'of the thimble is tapered and split. The interior oi' the tapered andsplit end is provided, for a short distance, with interior screw-threads 14 et Y the same pitch aslthe exterior threads of they larger portion of the inner tube nipple 4.

Ordinarily the threaded portion of the split end of the thimble `ll is suiliciently expanded .to move freely overthe threads of the nipple 4 but whenl the thimble is moved intoY the lcontracted end 2 `ofthe shell l a suilicient distance the split end of the thimble is correspondingly contracted to cause the threads lthe thimble 11 and the freeend or the neck v l5 has annular lolite., seats o r ribs 16. -110 SU l K has? been Sary to; K

,not-wsijo limit the' use of the menfmr,

vthe thimh' ts mantra@ the threaded pcm-,ion

engagement f with Y th@ i wemjf p'alte 19 f fercing fthefggierox? Kscrewthreads of ail inner tub K Causa del m tire pumps.

thef'atter' and also 'ta @misma movement of the-reni Vaimant 13kg inner tuba' nppe inta -K mesng' reasiori with Ehe thfeads therea. 5K 2;QKA` tire .pump connection ccvmprsingf a l'shel; a) ongtudimly movable thmbe; 95 therein having a' Split cemtmctef and with@ l! thee-nd if ,the Shen' remt from the thmble j 011 forcing the fn'wer against the' thmbe and Iaganss; this elgstie sleeve to Causwon:

bracefthei inner" tube* nipple; @n da, means ,at the' Kenai of thelshel ,-remms imm 'j hg mmm@ andfggainmhe lagcic may@ y @i @uw Kntratioh f* the kthmble engage 1 actuate the follower.

4. A tire pump connection comprising an open-ended shell with the interior of one end contracted, a thinible lodged in the contracted end of the shell and also contracted and split longitudinally, said thimble at the contracted end being provided with interior screw threads corresponding to the exterior threads on an inner tube nipple, and means within the thiinble and contracted by the contractech a thimble lodged in the shell and movable lengthwise thereof, said thimble being split lengthwise for a portion of its length with the split portion extending to one end and at said end the thimble being contracted and provided with interior l screw-threads conforming to the vscrew- Y extremity of the neck provided with knife threads of an inner tube nipple, a follower within the shell provided with an axiallyI extended neck entering the thinible with the seats, said follower also having an elbow eX- tension projecting through oney side of the shell and the latter having an elongated slot for the passage of the elbow, an f elastic sleeve or gasket seated in the thimblein the path of the neck of the follower and eX- tended toward the contracted end of the thirnble, and a cam lever mounted in the shellat the open end thereof remote from the thimble and adapted togexert pressure on the follower to in turn compress the elastic sleeve or gasket and to lnove therthimble lengthwise of the shell toward the contracted end thereof whereby to contract the split end of the thimble into meshing engage ment with the threads on the inner tube nipple, i

6. In a device of the class described, a shell, a follower in the shell having an axial bore and having means for the attachment of a hose thereto, a thimble in thershell in coactive relation to the follower, a yieldable gasket within the thilnble at one end of the follower, and means for forcing the follower and thimble against the gasket te compress the latter.

7. In a device of the class described, a shell having one end contracted, a Yfollower in the shell having an axial bore with means for the attachment of a hoseithereto, a thim -ble in the shell in telescoping relation to the follower and having a contractible end, a gasket in the form of a sleeve located within the thiinble and at one end of the follower and in alinernent with the bore of the latter, andnieans for forcing the follower against the gasket to compress the latter and to force the contractible end of the thirnble against the contracted end of the shell.

v 8. n a device of the class described, a shell constituting the body thereof, a foilowerin the shell having an axial bore with means for the attachment of a hose thereto, aV thimble in the shell in'coactive relation to the follower and having a contractible end, a gasket within the thimble formed of a cylindrical sleeve located at one end of the follower, said sleeve having an inner-fpassageway of suliicient diameter to slip freely over a tire nipple,rand means for forcing the follower against the gasket to compress the latter about the nipple and also canse a movement of the thimble to contract the end thereof 'about the nipple.

9. A tire pump connection comprising an open-ended shell with one end contractedfa thimble in the. shell lengthwise thereof and having portions contractible by the contraction of the shell, 'a follower within the shell provided with an axially extended neck entering the thimble, the extremity of the neck being provided with annular knife seats, an elastic sleeve or gasket seated in the thimble inthe path of the neck of the follower and haviigg one end thereof engageable by said knife seats, and means adapted to exert pressure upon the follower to contract V.both the thimbl'e andVY sleeve to form an airltight connection.

In testimony that I claim the foregoing as my own, I have hereto affixed my signa- Titnesses :r

Jon C. Woonronn, i THELMA AIKnN. 

